Noun saurischia has 1 sense
  1. Saurischia, order Saurischia - extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
    --1 is a kind of animal order
    --1 is a member of Archosauria, subclass Archosauria
    --1 has members:
     saurischian, saurischian dinosaur; Sauropodomorpha, suborder Sauropodomorpha
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